Stroke limit device used for linear actuator and take-up mechanism thereof

Abstract

The invention discloses a stroke limit device used for a linear actuator and a take-up mechanism thereof. The linear actuator comprises an engine base and an extension tube, and the stroke limit device comprises a box body, a movable component, a block body, a pair of switches and a take-up mechanism. The box body is fixed at the engine base and is provided with a wallboard, and a through hole is arranged at the wallboard. The movable component comprises a rod body which penetrates through the through hole and can move relatively to the box body, and the block body is fixedly connected onto the rod body. The positions of the pair of switches corresponding to the block body are fixedly arranged at the box body, each switch is provided with a triggering part on which the block body touches to generate an electric signal, and the triggering parts are respectively positioned at two phases of different ends of a move path of the block body. The take-up mechanism comprises a line body which is placed in the extension tube and moves along with the extension tube, and one end of the line body is connected with the movable component. Thus, the stroke limit device can utilize the actuating range of small space to control the extreme position of a long distance.

Description

technical field [0001] The invention relates to an electric cylinder, in particular to a stroke limiting device for the electric cylinder and a wire take-up mechanism thereof. Background technique [0002] There are many types of electric cylinders (Linear Actuator) currently on the market, one of which is to assemble an electric motor and an outer tube on a machine base, place a lead screw on the machine base and use the electric motor to drive the lead screw to rotate. A telescopic tube is screwed on the outside of the lead screw, and an outer tube is sleeved on the outside of the telescopic tube, and one end of the outer tube is fixed on the machine base; in this way, the telescopic tube can be driven by the motor, and relative to the outer tube along the axial direction of the lead screw. Although the linear reciprocating displacement is performed, this type of electric cylinder cannot know whether the telescopic tube has moved to the end of the stroke when it is actuate...

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Problems solved by technology

[0004] However, although the above structure has the purpose of controlling the stroke limit of the electric cylinder, its switch is arranged inside the outer tube. Therefore, the outer tube must be specially formed with a space for the placement of each switch, which not only makes the production of the outer tube difficult but also relatively expensive. In addition, the switches are respectively located at the two ends of the outer tube. In the maintenance process of the damaged components, most of the components of the electric cylinder must be disassembled, which makes the maintenance quite cumbersome and unnecessary. Convenience; in addition, for some electric cylinders with special shapes or specifications, the aforementioned stroke limiting device cannot be installed and set, and needs to be improved and overcome.

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